Swivel chair



FIG. 1 is a perspective view of a swivel chair showing my new design;

FIG. 2 is a front view;

FIG. 3 is a right side view;

FIG. 4 is a left side view;

FIG. 5 is a rear view thereof;

FIG. 6 is a perspective view of a second embodiment of the swivel chair showing my new design;

FIG. 7 is a left side view thereof;

FIG. 8 is a perspective view of a third embodiment of the swivel chair showing my new design;

FIG. 9 is a front view;

FIG. 10 is a left side view; and,

FIG. 11 is a rear view thereof. 

The ornamental design of a swivel chair, as shown and described. 